Read e-book online Circular and Linear Regression: Fitting Circles and Lines by PDF

By Nikolai Chernov

ISBN-10: 143983590X

ISBN-13: 9781439835906

Locate the proper set of rules to your photo processing program Exploring the new achievements that experience happened because the mid-1990s, round and Linear Regression: becoming Circles and features via Least Squares explains the way to use glossy algorithms to slot geometric contours (circles and round arcs) to saw information in photograph processing and computing device imaginative and prescient. the writer covers all facets—geometric, statistical, and computational—of the tools. He appears to be like at how the numerical algorithms relate to each other via underlying principles, compares the strengths and weaknesses of every set of rules, and illustrates find out how to mix the algorithms to accomplish the simplest functionality. After introducing errors-in-variables (EIV) regression research and its historical past, the booklet summarizes the answer of the linear EIV challenge and highlights its major geometric and statistical homes. It subsequent describes the idea of becoming circles through least squares, ahead of targeting useful geometric and algebraic circle becoming equipment. The textual content then covers the statistical research of curve and circle becoming tools. The final bankruptcy offers a pattern of "exotic" circle matches, together with a few mathematically subtle methods that use complicated numbers and conformal mappings of the advanced aircraft. crucial for realizing the benefits and barriers of the sensible schemes, this publication completely addresses the theoretical facets of the appropriate challenge. It additionally identifies imprecise matters which may be suitable in destiny examine.

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Additional resources for Circular and Linear Regression: Fitting Circles and Lines by Least Squares (Chapman & Hall CRC Monographs on Statistics & Applied Probability)

Sample text

Later this assumption was commonly adopted in the statistics literature. 5 The EIV fit minimizes the sum of squares of “skewed” distances from the data points to the line. Here κ = 2. Now the EIV regression problem has a well defined solution. In 1879 Kummell [117] gave formulas for the best fitting line that involved κ . 16). 14). This line minimizes the sum of squares of the distances to the data points (xi , yi ) measured along the vector (κ b, −1), see Fig. 5. Kummell arrived at his formula rather intuitively, but later it was determined that he actually found the maximum likelihood solution, cf.

We only overview some new troubles here. First of all, the nonlinear fitting problem may not even have a solution. 3. The nonexistence is a phenomenon specific to nonlinear problems only. 5. This leads to confusion in theoretical analysis. Furthermore, even when the best fit exists and is unique, nothing is known about the distribution of the resulting parameter estimates; there are no explicit formulas for their densities or moments. In fact, theoretical moments quite often fail to exist. 6. 4.

2: A line L not crossing the bounding box B. Recall that C represents the distance from the line to the origin. Since every line L ∈ L0 crosses the box B, we have a restriction C ≤ Cmax where Cmax is the distance from the origin to the most remote point of B. Thus the reduced space L0 is indeed compact. Theorem 1 The objective function F does attain its minimum value. Hence the orthogonal fitting line always exists. Remark. Our analysis also demonstrates that if one works with parameters A, B, C subject to the constraint A2 + B2 = 1, then |A|, |B| ≤ 1 and |C| ≤ Cmax .

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Circular and Linear Regression: Fitting Circles and Lines by Least Squares (Chapman & Hall CRC Monographs on Statistics & Applied Probability) by Nikolai Chernov


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